The crawler crane model LR 1300 with attached fixed leader system served as the basic machine, while the LRH 600 is a piling rig suitable for tough piling operations with large radius.

The H 10 L hammer is currently the largest model of three in the new series and has a maximum impact energy of 225kNm.

According to Liebherr, key advantages of the attachment include the modular weights, whereby the hammer can be adapted to the respective piling requirements; and due to the short and lightweight design, the hammer is efficient as well as user-friendly in terms of transportation and maintenance. In addition, the pile helmet is soundproof in the standard version.

The innovative control is integrated in the system of the Liebherr basic machines, the company said. This allows for better adjustment in accordance with the respective conditions and thus ensures more efficient operation. In addition to the LR 1300, the duty cycle crawler crane HS 895 HD can also be used as a basic machine. Only a slight modification is required with both machines. Libeherr stated that owing to the high engine power of these basic machines, the hammer can be operated directly from the on-board hydraulic system, thus no additional power pack is required.

The leader elements of the LRH 600 are designed for easy and quick assembly by means of pin connections. Stability is ensured through the lattice boom design and also by the fact that the kicker is secured via supporting tubes at the boom head. Two compensating cylinders make sure that the leader remains parallel to the upper carriage. Inclination and radius can be adjusted using another pair of cylinders.

With a fixed leader the LRH 600 has an effective working length of 5m and a maximum radius of 15m. Due to the leader kinematics, inclinations of up to 14° backwards and 9.5° forwards are possible. The pull force extends to roughly 120t.

The concept of the new fixed leader enables a diverse range of deep foundation applications. In addition to piling work with a hammer or a vibrator, these applications include drilling operations with continuous flight auger or down-the-hole hammer, as well as diverse procedures for soil improvement such as soil mixing and cutter soil mixing.